AriguanÃÂ River () is a river in northern Colombia's Caribbean Region born in the Sierra Nevada de Santa Marta mountain range in the area of the municipality of Pueblo Bello. The AriguanÃÂ is an affluent of the Cesar River and flows from north to south into it near the town of El Paso. The AriguanÃÂ River is also a natural and political border between the Cesar and Magdalena Departments.